s-acetyl glutathione side effects S-Acetyl-Glutathione Attenuates Carbon Tetrachloride-Induced Liver Injury by Modulating Oxidative Imbalance and Inflammation N-Acetylcysteine (NAC): Impacts on Human

Doctor was upfront that it is off-label and individual

10.1073/pnas.1912774117 264 ZhangZ.QiD.WangX.GaoZ.LiP.LiuW.et al (2018b)

Heres a quick list of inexpensive testing options: 23andMe AncestryDNA MyHeritage Sequencing .com SelfDecode MyGene Food TellMeGen In addition to understanding your MTHFR variants from your DNA raw data, you may also want to consider testing your homocysteine levels to see what your current status is

Influence of age, sex and vitamin status on fasting and post-methionine load plasma homocysteine levels

You will not see changes on lab work in 2 weeks

Additionally, while a decreased sense of taste can be a sign of zinc deficiency, research suggests the zinc taste test (ZTT) is an unreliable way to assess zinc status